83 lines
3.3 KiB
JavaScript
83 lines
3.3 KiB
JavaScript
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(function() {
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var DEFAULT_BRACKETS = "()[]{}''\"\"";
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var DEFAULT_EXPLODE_ON_ENTER = "[]{}";
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var SPACE_CHAR_REGEX = /\s/;
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CodeMirror.defineOption("autoCloseBrackets", false, function(cm, val, old) {
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if (old != CodeMirror.Init && old)
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cm.removeKeyMap("autoCloseBrackets");
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if (!val) return;
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var pairs = DEFAULT_BRACKETS, explode = DEFAULT_EXPLODE_ON_ENTER;
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if (typeof val == "string") pairs = val;
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else if (typeof val == "object") {
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if (val.pairs != null) pairs = val.pairs;
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if (val.explode != null) explode = val.explode;
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}
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var map = buildKeymap(pairs);
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if (explode) map.Enter = buildExplodeHandler(explode);
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cm.addKeyMap(map);
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});
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function charsAround(cm, pos) {
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var str = cm.getRange(CodeMirror.Pos(pos.line, pos.ch - 1),
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CodeMirror.Pos(pos.line, pos.ch + 1));
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return str.length == 2 ? str : null;
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}
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function buildKeymap(pairs) {
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var map = {
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name : "autoCloseBrackets",
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Backspace: function(cm) {
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if (cm.somethingSelected()) return CodeMirror.Pass;
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var cur = cm.getCursor(), around = charsAround(cm, cur);
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if (around && pairs.indexOf(around) % 2 == 0)
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cm.replaceRange("", CodeMirror.Pos(cur.line, cur.ch - 1), CodeMirror.Pos(cur.line, cur.ch + 1));
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else
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return CodeMirror.Pass;
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}
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};
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var closingBrackets = "";
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for (var i = 0; i < pairs.length; i += 2) (function(left, right) {
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if (left != right) closingBrackets += right;
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function surround(cm) {
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var selection = cm.getSelection();
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cm.replaceSelection(left + selection + right);
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}
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function maybeOverwrite(cm) {
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var cur = cm.getCursor(), ahead = cm.getRange(cur, CodeMirror.Pos(cur.line, cur.ch + 1));
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if (ahead != right || cm.somethingSelected()) return CodeMirror.Pass;
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else cm.execCommand("goCharRight");
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}
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map["'" + left + "'"] = function(cm) {
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if (left == "'" && cm.getTokenAt(cm.getCursor()).type == "comment")
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return CodeMirror.Pass;
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if (cm.somethingSelected()) return surround(cm);
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if (left == right && maybeOverwrite(cm) != CodeMirror.Pass) return;
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var cur = cm.getCursor(), ahead = CodeMirror.Pos(cur.line, cur.ch + 1);
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var line = cm.getLine(cur.line), nextChar = line.charAt(cur.ch), curChar = cur.ch > 0 ? line.charAt(cur.ch - 1) : "";
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if (left == right && CodeMirror.isWordChar(curChar))
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return CodeMirror.Pass;
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if (line.length == cur.ch || closingBrackets.indexOf(nextChar) >= 0 || SPACE_CHAR_REGEX.test(nextChar))
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cm.replaceSelection(left + right, {head: ahead, anchor: ahead});
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else
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return CodeMirror.Pass;
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};
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if (left != right) map["'" + right + "'"] = maybeOverwrite;
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})(pairs.charAt(i), pairs.charAt(i + 1));
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return map;
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}
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function buildExplodeHandler(pairs) {
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return function(cm) {
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var cur = cm.getCursor(), around = charsAround(cm, cur);
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if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
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cm.operation(function() {
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var newPos = CodeMirror.Pos(cur.line + 1, 0);
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cm.replaceSelection("\n\n", {anchor: newPos, head: newPos}, "+input");
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cm.indentLine(cur.line + 1, null, true);
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cm.indentLine(cur.line + 2, null, true);
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});
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};
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}
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})();
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